Remove association with blank file extension?

The launcher for Mass Effect 2 mistakenly associates itself with files with no extension. The game's patch apparently fixes this, but it's too large for me to download on this connection. How do I fix this myself? It doesn't appear on Windows' "set associations" list. (Windows 7 x64)


Solution 1:

Resolved it - ended up deleting HKEY_CLASSES_ROOT\Type to fix this